Processor and Chipset Intel® Server Board SDS2
Revision 1.2
Order Number: A85874-002
4
3. Processor and Chipset
The Server Works* ServerSet III HE-SL chipset provides the 36-bit address, 72-bit data (64-bit
data + 8-bit ECC) processor host bus interface, operating at 133 MHz in the AGTL signaling
environment. The HE-SL North Bridge provides an integrated memory controller, the interface to
32-bit, 33-MHz Rev 2.2 compliant PCI bus, and two Inter-Module Bus interfaces. The Inter-
Module Bus (IMB) provides the interface to two 64-bit, 66-MHz Rev 2.2 compliant PCI buses via
the CIOB20.
The SDS2 DP Server Board directly supports up to 6 GB of ECC memory, using six PC-133-
compliant registered SDRAM DIMMs. The ECC implementation in the HE-SL can detect and
correct single-bit errors, and it can detect multiple-bit errors.

3.1 Processors

The SDS2 Server Board supports two Intel® Pentium® III processors in the Socket 370 FCPGA2
package. If two processors are installed, both processors must be of identical revisions with the
same core voltage and speed for the bus and core. If one processor is installed, an AGTL
terminator module must be installed in the other socket. The support circuitry on the Server
Board consists of the following:
• Dual Socket 370 FCPGA2 processor sockets supporting 133-MHz FSB (if using one
processor, an AGTL terminator module goes in the empty socket)
• Processor host bus AGTL support circuitry, including termination power supply
Table 1. SDS2 Intel® Pentium® III Processor Support Matrix
Processor
Family Package
Type MM## Speed
Core/Bus
Cache
Size Core
Stepping CPUID
S-Spec
Supported
Intel
Pentium III FCPGA 800MHz – 1.0GHz
256KB N/A N/A No
Intel
Pentium III –
Tray
FCPGA2 836606 1.BGHz/133MHz 256KB cD0 068Ah
SL5QJ
Yes
Intel
Pentium III –
Tray
FCPGA2 836716 1.13GHZ/133MHz 512KB tA1 06B1h
SL5PU
Yes
Intel
Pentium III –
Boxed
FCPGA2 836384 1.13GHZ/133MHz 512KB tA1 06B1h
SL5LV
Yes
Intel
Pentium III –
Tray
FCPGA2 836721 1.26GHZ/133MHz 512KB tA1 06B1h
SL5QL
Yes
Intel
Pentium III –
Boxed
FCPGA2 836583 1.26GHZ/133MHz 512KB tA1 06B1h
SL5LW
Yes
Intel FCPGA2 838253 1.4GHZ/133MHz 512KB tA1 06B1h Yes